Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/59594
Type: Artigo de periódico
Title: Photodegradation of dichloroacetic acid and 2,4-dichlorophenol by ferrioxalate/H2O2 system
Author: Nogueira, RFP
Guimaraes, JR
Abstract: The photo-Fenton process using potassium ferrioxalate as a mediator in the photodegradation reaction of organochloride compounds in an aqueous medium was investigated. The influence of parameters such as hydrogen peroxide and ferrioxalate concentrations and initial pH, was evaluated using dichloroacetic acid (DCA) as a model compound under black-light lamp irradiation. An upflow annular photoreactor, operating in a single pass or recirculating mode was used during photodegradation experiments with artificial light. The extent of the release of chloride ions was used to evaluate the photodegradation reaction. The optimum pH range observed was 2.5-2.8. The efficiency of DCA dechlorination increased with increasing concentrations of H2O2 and potassium ferrioxalate. reaching a plateau after the addition of 6 and 1.5 mmol/L of those reagents, respectively, The total organic carbon (TOC) content in DCA and 2,4-dichlorophenol (DCP) solutions was compared with the chloride released after photodegradation. The influence of natural solar light intensity, measured at 365 nm, was evaluated for the dechlorination of DCA on typical summer's days showing a linear dependency. The photodegradation of DCA using black-light lamp and solar irradiation was compared. (C) 2000 Elsevier Science Ltd. All rights reserved.
Subject: photodegradation
Fenton's reaction
ferrioxalate
dichloroacetic acid
2,4-dichlorophenol
Country: Inglaterra
Editor: Pergamon-elsevier Science Ltd
Rights: fechado
Date Issue: 2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
WOS000084822200021.pdf165.76 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.